The correct answer is Control Section.Control section commands are responded by the Arithmetic and Logical Unit of the computer.CPU has three main components:Arithmetic Logic Unit (ALU):It performs all the arithmetic operations like addition (+), multiplication (*), subtraction (-), division (/) on the numerical data directed by the control unit. All the logical operations, like less than (<), greater than (>), equal to (=), not equal to (?), etc. are also carried out by ALU.Control Unit (CU): ?It controls and coordinates all the operations taking place in the system.It controls the flow of data and information from one unit to the other.Registers/Memory Unit (MU):To execute a program, data and instructions need to be stored temporarily.This storage is done in the MU. The data and instructions are retrieved from MU by Control Unit for supplying to ALU as when required by the program.Additional Information Primary memory is the main memory of the system which is directly accessed by the processing units.Examples: RAM, ROM, EPROM, Cache memory, etc.External memory comprises devices that store information outside a computer. Examples: CD, Pen drives, memory cards, etc.Cache memory is an extremely fast memory that stores data of the main memory that is used frequently by the CPU.